Elemental and radiological characterization of commercial Cetraria islandica (L.) Acharius pharmaceutical and food supplementation products

Meli, Maria Assunta; Desideri, Donatella; Cantaluppi, Chiara; Ceccotto, Federica; Feduzi, Laura; Roselli, Carla

doi:10.1016/j.scitotenv.2017.08.320

Cited by 24 publications

(9 citation statements)

References 17 publications

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“…The antimicrobial activity of the pure extracts shows biocidal activity only in C. islandica . These results corroborate with those obtained by Meli et al [ 15 ].…”

Section: Resultssupporting

confidence: 94%

“…Structurally, lichen and buckwheat consist of different amounts of carbohydrates. In buckwheat polysaccharides, where starch is the main component, in order for C. islandica , thallus structure is approximately 50% of lichenin and isolichenin [ 15 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

“…However, these species are better known for high antioxidant activity, reducing the force, with peroxide anion radical removal and free radical removal activities [ 13 , 14 ]. C. islandica is widely used in folk medicine for fever, lung and kidney diseases, throat and mouth problems, bronchitis and dry cough, and susceptibility to infection [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Antimicrobial Activities against Opportunistic Pathogenic Bacteria Using Green Synthesized Silver Nanoparticles in Plant and Lichen Enzyme-Assisted Extracts

Balčiūnaitienė

Štreimikytė

Puzerytė

et al. 2022

Plants

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Enzyme-assisted extraction is a valuable tool for mild and environmentally-friendly extraction conditions to release bioactive compounds and sugars, essential for silver nanoparticle (AgNP) green synthesis as capping and reducing agents. In this research, plant and fungal kingdoms were selected to obtain the enzyme-assisted extracts, using green synthesized AgNPs. For the synthesis, pseudo-cereal Fagopyrum esculentum (F. esculentum) and lichen Certaria islandica (C. islandica) extracts were used as environmentally-friendly agents under heating in an aqueous solution. Raw and enzyme-assisted extracts of AgNPs were characterized by physicochemical, phytochemical, and morphological characteristics through scanning and transmission electron microscopy (SEM and TEM), as well as Fourier transform infrared spectroscopy (FTIR). The synthesized nanoparticles were spherical in shape and well dispersed, with average sizes ranging from 10 to 50 nm. This study determined the total phenolic content (TPC) and in vitro antioxidant activity in both materials by applying standard methods. The results showed that TPC, ABTS•+, FRAP, and DPPH• radical scavenging activities varied greatly in samples. The AgNPs derived from enzymatic hydrolyzed aqueous extracts C. islandica and F. esculentum exhibited higher antibacterial activity against the tested bacterial pathogens than their respective crude extracts. Results indicate that the extracts’ biomolecules covering the AgNPs may enhance the biological activity of silver nanoparticles and enzyme assistance as a sustainable additive to technological processes to achieve higher yields and necessary media components.

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“…The antimicrobial activity of the pure extracts shows biocidal activity only in C. islandica . These results corroborate with those obtained by Meli et al [ 15 ].…”

Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Antimicrobial Activities against Opportunistic Pathogenic Bacteria Using Green Synthesized Silver Nanoparticles in Plant and Lichen Enzyme-Assisted Extracts

Balčiūnaitienė

Štreimikytė

Puzerytė

et al. 2022

Plants

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“…According to Meli et al (2018), lichens more easily accumulate air pollutants because they get most of their nutrients from the air; moreover, they have slow-growing properties and long life spans [ 53 ]. This capacity of lichens to accumulate various metals—especially heavy/trace metals—must be rigorously considered when exploring their use as edible or medicinal plants [ 38 , 54 ].…”

Section: Discussionmentioning

confidence: 99%

Elemental Analysis and In Vitro Evaluation of Antibacterial and Antifungal Activities of Usnea barbata (L.) Weber ex F.H. Wigg from Călimani Mountains, Romania

Popovici

Bucur

Calcan

et al. 2021

Plants

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This study aims to complete our research on Usnea barbata (L.) Weber ex F.H. Wigg (U. barbata) from the Călimani Mountains, Romania, with an elemental analysis and to explore its antibacterial and antifungal potential. Thus, we analyzed twenty-three metals (Ca, Fe, Mg, Mn, Zn, Al, Ag, Ba, Co, Cr, Cu, Li, Ni, Tl, V, Mo, Pd, Pt, Sb, As, Pb, Cd, and Hg) in dried U. barbata lichen (dUB) by inductively coupled plasma mass spectrometry (ICP-MS). For the second study, we performed dried lichen extraction with five different solvents (ethyl acetate, acetone, ethanol, methanol, and water), obtaining five U. barbata dry extracts (UBDE). Then, using an adapted disc diffusion method (DDM), we examined their antimicrobial activity against seven bacterial species—four Gram-positive (Staphylococcus aureus, Enterococcus casseliflavus, Streptococcus pyogenes, and Streptococcus pneumoniae) and three Gram-negative (Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa)—and two fungi species (Candida albicans and Candida parapsilosis). Usnic acid (UA) was used as a positive control. The ICP-MS data showed a considerable Ca content (979.766 µg/g), followed by, in decreasing order, Mg, Mn, Al, Fe, and Zn. Other elements had low levels: Ba, Cu, Pb, and Cr (3.782–1.002 µg/g); insignificant amounts (<1 µg/g) of Hg and V were also found in dUB. The trace elements Ag, As, Cd, Co, Li, Tl, Mo, Pd, Pt, and Sb were below detection limits (<0.1 µg/g). The DDM results—expressed as the size (mm) of the inhibition zone diameter (IZs)—proved that the water extract did not have any inhibitory activity on any pathogens (IZs = 0 mm). Gram-positive bacteria displayed the most significant susceptibility to all other UBDE, with Enterococcus casseliflavus showing the highest level (IZs = 20–22 mm). The most susceptible Gram-negative bacterium was Pseudomonas aeruginosa (IZs = 16–20 mm); the others were insensitive to all U. barbata dry extracts (IZs = 0 mm). The inhibitory activity of UBDE and UA on Candida albicans was slightly higher than on Candida parapsilosis.

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“…Both 210 Po and 209 Po were plated continuously at 85–90°C and 1.5–2.0 pH on a silver disk for 4 h. They were then placed in a syringe and immersed in the solution derived from the complete dissolution of the sample or from the digestion procedures (200 mL of 1 M HCl). No preliminary separation was necessary, and essential quantitative recoveries were calculated using the 209 Po tracer [ 32 ]. The discs were counted by an α-spectrometer fitted with a silicon surface barrier semiconductor detector (300 mm 2 active surface, resolution 20 keV, 31.7±3.1% counting efficiency, and 2 x 10 −6 s -1 of the background in the affected energy region) (Canberra Industries, Inc., 800 Research Parkway, Meriden, CT 06450) and connected to a computerized multichannel analyzer.…”

Section: Methodsmentioning

confidence: 99%

Bioaccessibility assessment of stable elements and 210Po in food

et al. 2020

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Element bioaccessibility consists of the fraction of the element that is mobilized from food matrices into digestive extractants. The degree of bioaccessibility of a toxic metal is a fundamental consideration in estimating its bioavailability. In addition, gaining a better understanding of the essential elements released into the gastro intestinal fluids allows a more thorough assessment of the health benefits of food matrices in the field of nutrition science. In the present study, an in vitro digestion model simulating gastro-intestinal digestion (GID) was used to investigate the bioaccessibility of stable elements in mixed leaf salad and 210 Po in various foods (meat, seafood, vegetables). The simulation was carried out over three phases: after a pre-treatment with a saliva solution, raw and cooked seafood samples were subjected to a complete simulated gastrointestinal digestion (gastric digestion followed by bile-pancreas digestion). The 210 Po bioaccessibility was found to range from 16.2±9.39% to 62.8±17.7% and from 6.26±2.15% to 67.5±13.1% for raw and cooked food respectively.

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Elemental and radiological characterization of commercial Cetraria islandica (L.) Acharius pharmaceutical and food supplementation products

Cited by 24 publications

References 17 publications

Antimicrobial Activities against Opportunistic Pathogenic Bacteria Using Green Synthesized Silver Nanoparticles in Plant and Lichen Enzyme-Assisted Extracts

Antimicrobial Activities against Opportunistic Pathogenic Bacteria Using Green Synthesized Silver Nanoparticles in Plant and Lichen Enzyme-Assisted Extracts

Elemental Analysis and In Vitro Evaluation of Antibacterial and Antifungal Activities of Usnea barbata (L.) Weber ex F.H. Wigg from Călimani Mountains, Romania

Bioaccessibility assessment of stable elements and 210Po in food

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